package cn.easybuy.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class EncodFilter implements Filter{
	private String charset=null;
	@Override
	public void destroy() {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void doFilter(ServletRequest arg0, ServletResponse arg1,
			FilterChain arg2) throws IOException, ServletException {
		HttpServletRequest request=(HttpServletRequest)arg0;
		HttpServletResponse response=(HttpServletResponse)arg1;
		if (charset!=null) {
			request.setCharacterEncoding(charset);
			response.setContentType("text/html;charset="+charset);
		}
		arg2.doFilter(arg0, arg1);
		
	}

	@Override
	public void init(FilterConfig arg0) throws ServletException {
		String initParam=arg0.getInitParameter("charset");
		if (initParam!=null&&initParam.trim().length()!=0) {
			charset=initParam;
		}else {
			charset="utf-8";
		}
		
	}

}
